The explorer is running in 'regtest' mode. This saves disk space, but there is limited data.
The code for this application can be found at github.com/pdxrod/blockchain_explorer.

home    blocks

Enter a block height, e.g. 123, or the start of a bitcoin address, e.g. mxMfLjAez

Height: 743
Hash: 2e395e160959d0186d66ba9aea1d6552d35cf9a08b04d1639074319a700787fc
Previous block: 523268aba656705deef476a06b94fc72ceeb0182ccb3f2723635932130d59d45
Next block: 0028ea1f896371731cb1180579d4ff6012a4a641a62ee981212d36e41d7360f9
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701864267
Stripped size: 218
Size: 254
Nonce: 8
Merkle root: ded7c7634193f0864e5f60442dea146857cb4aaefc2ec10eb03f1dcc847ffce4
Median time: 1701864266
Difficulty: 4.656542373906925e-10
Confirmations: 1501
Chainwork: 00000000000000000000000000000000000000000000000000000000000005d0
Bits: 207fffff